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glslcc cmake module update
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@septag
septag committed Sep 2, 2019
1 parent cc7b3c8 commit a82b8b3
Showing 1 changed file with 89 additions and 38 deletions.
127 changes: 89 additions & 38 deletions cmake/glslcc.cmake
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Original file line number Diff line number Diff line change
@@ -1,17 +1,21 @@
string(TOLOWER ${CMAKE_SYSTEM_NAME} glslcc_platform_name)
if (IOS)
set(glslcc_platform_name "ios")
elseif (ANDROID)
set(glslcc_platform_name "android")
elseif (RPI)
set(glslcc_platform_name "rpi")
endif()

# resolve glslcc binary
if (NOT GLSLCC_BIN AND NOT glslcc_path)
# try to find glslcc executable path
# also take a guess (most likely for personal projects)
if (WIN32)
if (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
set(tools_dir "${PROJECT_SOURCE_DIR}/tools/windows")
elseif(APPLE)
elseif (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Darwin")
set(tools_dir "${PROJECT_SOURCE_DIR}/tools/darwin")
elseif(UNIX)
elseif(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
set(tools_dir "${PROJECT_SOURCE_DIR}/tools/linux")
endif()

Expand Down Expand Up @@ -62,14 +66,25 @@ function(join_array output glue values)
endfunction()

function(glslcc__target_compile_shaders target_name file_type source_files)
foreach(source_file ${source_files})
get_source_file_property(defs ${source_file} COMPILE_DEFINITIONS)
get_source_file_property(include_dirs ${source_file} INCLUDE_DIRECTORIES)
get_source_file_property(output_dir ${source_file} GLSLCC_OUTPUT_DIRECTORY)
get_source_file_property(shader_lang ${source_file} GLSLCC_SHADER_LANG)
get_source_file_property(shader_ver ${source_file} GLSLCC_SHADER_VERSION)
get_source_file_property(output_filename ${source_file} GLSLCC_OUTPUT_FILENAME)
get_source_file_property(compile_flags ${source_file} GLSLCC_COMPILE_FLAGS)
foreach(source_file_base ${source_files})
string(REPLACE "," ";" source_files_sub ${source_file_base})

# get file properties
list(GET source_files_sub 0 first_file)
list(LENGTH source_files_sub source_files_count)

if (${source_files_count} GREATER 1 AND NOT ${file_type} STREQUAL "sgs")
message(FATAL_ERROR "only 'sgs' shader types support multiple shader stages")
endif()


get_source_file_property(defs ${first_file} COMPILE_DEFINITIONS)
get_source_file_property(include_dirs ${first_file} INCLUDE_DIRECTORIES)
get_source_file_property(output_dir ${first_file} GLSLCC_OUTPUT_DIRECTORY)
get_source_file_property(shader_lang ${first_file} GLSLCC_SHADER_LANG)
get_source_file_property(shader_ver ${first_file} GLSLCC_SHADER_VERSION)
get_source_file_property(output_filename ${first_file} GLSLCC_OUTPUT_FILENAME)
get_source_file_property(compile_flags ${first_file} GLSLCC_COMPILE_FLAGS)

if (include_dirs)
set(include_dirs_abs)
Expand All @@ -96,6 +111,8 @@ function(glslcc__target_compile_shaders target_name file_type source_files)
set(shader_lang "hlsl")
elseif (${glslcc_platform_name} STREQUAL "android")
set(shader_lang "gles")
elseif (${glslcc_platform_name} STREQUAL "rpi")
set(shader_lang "gles")
elseif (${glslcc_platform_name} STREQUAL "ios")
set(shader_lang "msl")
elseif (${glslcc_platform_name} STREQUAL "linux")
Expand All @@ -112,6 +129,8 @@ function(glslcc__target_compile_shaders target_name file_type source_files)
set(shader_ver "50")
elseif (${glslcc_platform_name} STREQUAL "android")
set(shader_ver "300")
elseif (${glslcc_platform_name} STREQUAL "rpi")
set(shader_ver "200")
elseif (${glslcc_platform_name} STREQUAL "linux")
set(shader_ver "330")
endif()
Expand All @@ -121,12 +140,20 @@ function(glslcc__target_compile_shaders target_name file_type source_files)
# append system_name to output_path
set(output_dir ${output_dir}/${shader_lang})

if (${shader_lang} STREQUAL "gles")
if (${shader_ver} STREQUAL "200")
set(output_dir ${output_dir}2)
elseif ( ${shader_ver} STREQUAL "300")
set(output_dir ${output_dir}3)
endif()
endif()

if (NOT IS_DIRECTORY ${output_dir})
file(MAKE_DIRECTORY ${output_dir})
endif()
get_filename_component(output_dir ${output_dir} ABSOLUTE)
else()
message(FATAL_ERROR "GLSLCC_OUTPUT_DIRECTORY not set for file: ${source_file}")
message(FATAL_ERROR "GLSLCC_OUTPUT_DIRECTORY not set for file: ${first_file}")
endif()

# use --flatten-ubos all GLSL (gles/glsl) shaders
Expand All @@ -139,37 +166,59 @@ function(glslcc__target_compile_shaders target_name file_type source_files)
endif()

# determine the file from the extension
get_filename_component(file_ext ${source_file} EXT)
get_filename_component(file_name ${source_file} NAME_WE)
if (${output_filename} STREQUAL "NOTFOUND")
if (NOT file_type)
set(output_filename "${file_name}${file_ext}.${shader_lang}")
get_filename_component(file_ext ${first_file} EXT)
get_filename_component(file_name ${first_file} NAME_WE)
if (${source_files_count} EQUAL 1)
if (${output_filename} STREQUAL "NOTFOUND")
if (NOT file_type)
set(output_filename "${file_name}${file_ext}.${shader_lang}")
else()
set(output_filename "${file_name}${file_ext}.${file_type}")
endif()
else()
set(output_filename "${file_name}${file_ext}.${file_type}")
set(file_name "${output_filename}")
if (NOT file_type)
set(output_filename "${output_filename}${file_ext}.${shader_lang}")
else()
set(output_filename "${output_filename}${file_ext}.${file_type}")
endif()
endif()
else()
set(file_name "${output_filename}")
if (NOT file_type)
set(output_filename "${output_filename}${file_ext}.${shader_lang}")
if (${output_filename} STREQUAL "NOTFOUND")
if (NOT file_type)
set(output_filename "${file_name}.${shader_lang}")
else()
set(output_filename "${file_name}.${file_type}")
endif()
else()
set(output_filename "${output_filename}${file_ext}.${file_type}")
endif()
set(file_name "${output_filename}")
if (NOT file_type)
set(output_filename "${output_filename}.${shader_lang}")
else()
set(output_filename "${output_filename}.${file_type}")
endif()
endif()
endif()

set(output_filepath "${output_dir}/${output_filename}")


# make the final args
set(args)
if (${file_ext} STREQUAL ".vert")
set(args --vert=${source_file})
elseif (${file_ext} STREQUAL ".frag")
set(args --frag=${source_file})
elseif (${file_ext} STREQUAL ".comp")
set(args --comp=${source_file})
else()
message(FATAL_ERROR "Unknown shader file extension: ${source_file}")
endif()

# source files
foreach (source_file ${source_files_sub})
get_filename_component(file_ext ${source_file} EXT)

if (${file_ext} STREQUAL ".vert")
set(args ${args} --vert=${source_file})
elseif (${file_ext} STREQUAL ".frag")
set(args ${args} --frag=${source_file})
elseif (${file_ext} STREQUAL ".comp")
set(args ${args} --comp=${source_file})
else()
message(FATAL_ERROR "Unknown shader file extension: ${source_file}")
endif()
endforeach()

set(args ${args} --silent)
set(args ${args} --lang=${shader_lang})
Expand Down Expand Up @@ -206,24 +255,26 @@ function(glslcc__target_compile_shaders target_name file_type source_files)
OUTPUT ${output_filepath}
COMMAND ${glslcc_path}
ARGS ${args}
DEPENDS ${source_file}
DEPENDS ${source_files_sub}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
COMMENT "Compiling ${shader_lang_upper}: ${output_relpath}"
VERBATIM)

# add to source files
target_sources(${target_name} PRIVATE ${source_file} ${output_relpath})
target_sources(${target_name} PRIVATE "${source_files_sub}" ${output_relpath})
endforeach()
endfunction()

function(glslcc_target_compile_shaders target_name source_files)
glslcc__target_compile_shaders(${target_name} "" "${source_files}")
glslcc__target_compile_shaders(${target_name} "" "${source_files}")
endfunction()

function(glslcc_target_compile_shaders_h target_name source_files)
glslcc__target_compile_shaders(${target_name} "h" "${source_files}")
glslcc__target_compile_shaders(${target_name} "h" "${source_files}")
endfunction()

function(glslcc_target_compile_shaders_sgs target_name source_files)
glslcc__target_compile_shaders(${target_name} "sgs" "${source_files}")
# for sgs files, we assume that all of source_files are stages of one single sgs shader
join_array(source_files_joined "," "${source_files}")
glslcc__target_compile_shaders(${target_name} "sgs" ${source_files_joined})
endfunction()

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